Usallay I change my sheets every saturday laundry day, but there a few time when its 2 wks. Neatly make the bed when I change the sheets rest of the time I just pull up the sheet and comforter. Since I live alone only one side of the bed gets used the other side doesn't get messy.
Love the smell of sheets fresh from the line, when i was able to do that I'd bring them in and fluff them in the dryer to get rid the stiffness, same with bath towels.

I have to try to remind myself to use the other side of the mattress very so often. It's been a while since it was occupied. So, I find that I sleep on the right side of the bed toward the middle. There's definitely a 'spot' where I sleep - even if a flip the mattress, it doesn't take long for another spot to develop.